In our last article(Zipper Tests-Physical performance testing) already told us how to test the strength of the zipper, and that is not enough for us to judge what kind of zipper is the good zipper. Here we provide simple and direct ways to help you find a good zipper.
1. Metal Zipper, Nylon Zipper or Plastic Zipper...
When people buy zipper, the first thing is to confirm the what kind of zipper you want. There are so many kinds of Zippers, but group by material, here are mainly three kinds: metal zipper, nylon zipper and plastic zipper.
1.1 Metal Zipper
For metal zipper, material brass is better than aluminum. Aluminum teeth is cheap, but rough and easy to be broken. Of course, it is simple to distinguish brass and aluminum teeth by the weight, brass is heavier than aluminum. What`s more, aluminum is so easy to bending, so it can not be a good zipper choice if the zipper teeth is always out of shape.
1.2 Nylon Zipper
There are 2 kinds of nylon zipper, W/O cord nylon zipper and W/ cord nylon zipper.
W/O cord nylon zipper: The fastener element is formed into a spiral shape by a monofilament around the center line, and a fastener stringer
W/ cord nylon zipper: The fastener element is formed by a monofilament in the shape of a hollow spiral, and the fastener stringer is fixed on the cloth tape side by sewing
Absolutely, W/O cord nylon zipper is stable, and is mostly sold in market. In addition, to check if there is any miss of teeth for nylon zipper is also very important to judge the nylon zipper is good or bad.
1.3 Plastic Zipper
For plastic zipper, to check the color and cleanliness of zipper teeth is the most simple way to determine if it is a good zipper.
2. Type and Length
Type and length are the basic specifications of zipper, cause no one want a zipper with wrong size. The zipper type means the width of zipper teeth, usually there are 3# 4# 5# 8# 10# regular type of zipper. Below are the detailed specifications for zipper type:
| Zipper Type | 3# | 4# | 5# | 8# | 10# |
| Metal Zipper | 3.9~4.8 mm
| 4.9~5.4 mm | 5.5~6.2 mm | 7.2~8 mm | 10~10.6 mm |
| Nylon Zipper | 3.9~4.8 mm
| 4.9~5.4 mm
| 5.6~6.4 mm | 7.2~8 mm
| 10~10.6 mm
|
| Plastic Zipper | 3.9~4.8 mm
| 4.9~5.4 mm
| 5.5~6.2 mm
| 7.2~8 mm | 8.2~8.7 mm |
About the zipper length, the length of open end zipper is from the top stopper to the insert/box, and the length of close end zipper is from the top stopper to the bottom end. Almost of zipper will remain 1.5 inches length as a extra Knife edge.
3. The flatness of the zipper
Zipper straightness test method: Take a finished zipper, flat on the flat platform, make it in a natural state, and then use the finger along the edge of the tooth along the sides of a move back and forth, with a straight edge to bend closer to , And then use another ruler to take the distance between the foot and the ruler, this distance is flatness.
4. Zipper teeth & tape color
The color of both zipper teeth and tape must match the sample color. When check the color, must reconfirm if one zipper with different parts different color, or one kind zipper with different Color Zipper. Besides, we can test if the zipper can endure the industrial washing, and do not fade.
5. Zipper Slider & puller
Surface printing color should be, no surface broken, no foreign body scratches, coating thickness not less than 3UM, painting, spray lacquer surface bright color uniform coating firm, no bubbles, no dead ends and other defects.
For further methods to find good zippers, contact us at any time!
YYX Zipper, your reliable choice!
